//
//  NSArray+RunTime.h
//  测试数组越界
//
//  Created by 曹运 on 16/7/11.
//  Copyright © 2016年 曹运. All rights reserved.
//

#import <Foundation/Foundation.h>
#import <objc/runtime.h>
@interface NSArray (RunTime)
- (id)safeObjectAtIndex:(NSUInteger)index;
@end
